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Landing gears aerodynamic interaction noise

Dobrzynski, W. and Pott-Pollenske, M. and Foot, D. and Goodwin, M. (2004) Landing gears aerodynamic interaction noise. ECCOMAS, Jyväskylä (fi), 24.-28.07.2004.

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Abstract

Airframe noise is generated as a result of the interaction of turbulent flow with different airframe components, i.e. the high lift devices and landing gears in particular, and may dominate over engine noise in the approach phase of large commercial aircraft. This paper describes the landing gears interaction noise research work in the EC co-financed project "Significantly Lower Community Exposure to Aircraft Noise" (SILENCER). Systematic steady and unsteady landing gear wake measurements were performed on differently scaled A340 type centre and main landing gears. The analysis of wake measurements showed almost isotropic turbulence characteristics for short distances downstream. Noise measurements were performed for a main landing gear being exposed to the wake flow of a centre landing gear. It turned out that only low frequency interaction noise is likely to be radiated while at high frequencies a noise reduction is obtained due to reduced mean wake flow speed.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Landing gears aerodynamic interaction noise
Authors:
AuthorsInstitution or Email of Authors
Dobrzynski, W.UNSPECIFIED
Pott-Pollenske, M.UNSPECIFIED
Foot, D.Airbus UK
Goodwin, M.Airbus UK
Date:2004
Status:Published
Keywords:Airframe noise, landing gear noise, aerodynamic interaction noise
Event Title:ECCOMAS, Jyväskylä (fi), 24.-28.07.2004
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:42

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